Intermediate purlin



FIG. 1 is a perspective view of a shelter illustrating the location of a intermediate purlin;

FIG. 2 is a perspective view of a single intermediate purlin;

FIG. 3 is a side view of an intermediate purlin; and,

FIG. 4 is a cross sectional view of the intermediate purlin taken along line 4—4 in FIG. 3.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

I claim the ornamental design for a intermediate purlin, as shown and described. 